Against the law / David Gordon.

Enhanced descriptions from Syndetics:

Joe is an ex-Special Forces operative with a bad case of PTSD and some substance abuse issues, trying to rebuild a simple life as a strip club bouncer living with his grandmother in Queens. But this simple life is constantly complicated by the fact that, at the invitation of a childhood friend, now a Mafia boss, Joe also moonlights as a fixer for the most powerful crime families in town.

In his newest assignment, Joe is sent to take out a shadowy figure named Zahir, the faceless name behind White Angel, a powerful new brand of heroin invading the mob's territories and threatening their sales. Then Joe discovers a link between Zahir and a shady group of private military contractors, and the stakes of his mission become increasingly deadly.

Soon the Five Boroughs are on the verge of an all-out drug war, pitting Joe and the crime world's most infamous talents against a ruthless clan of professional killers. Joe's only chance to calm the violence is to intercept the newest shipment of Zahir's product--if his skills as a master thief prove up to the task.

A comic caper with heists, car chases, and shoot-outs aplenty, Against the Law is Joe the Bouncer's most exciting outing to date, as humorous as it is thrilling. Gordon's memorable characters, tight plotting, and breathless action sequences make this a standout in the pantheon of the New York crime novel, certain to appeal to fans of authors such as Donald E. Westlake and Elmore Leonard.